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150 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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150 questions

Question 1 of 20 150 total questions

Question 31

jamb 2019

Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?

AII only

BIII only

CI & IV only

DII & III only

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Question 32

jamb 2019

"Sum of all forces acting on a body is zero." This condition represents equilibrium'

AFirst condition

BSecond condition

CThird condition

DFourth condition

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Question 33

jamb 2019

A well 1km deep is filled with a liquid of density 950kg/m\(^3\) and g = 10m/s\(^2\), the pressure at the bottom of the well is

A9.6 × 10\(^6\)N/m\(^2\)

B9.5 x 10\(^5\)N/m\(^2\)

C9.4 x 10\(^6\)N/m\(^2\)

D9.5 x 10\(^6\)N/m\(^2\)

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Question 34

jamb 2019

Efficiency of conduction in liquids and gases compared to solids is

Aless efficient than solid

Bmore efficient than solids

Cequally efficient to solids

Defficiently may vary

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Question 35

jamb 2019

Which of the following statements is/are correct for a freely falling body?
I. the total is entirely kinetic
II. the ratio of potential energy to kinetic energy is constant
III. the sum of potential and kinetic energy is constant

AI only

BII only

CIII only

DI & III only

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Question 36

jamb 2019

An object is acted upon by a system of parallel forces causing the object to be in state equilibrium. Which of the following statement is not correct

Athe resultant of the parallel forces is zero

Bthe algebraic sum of all the moments of the forces is zero

Call the parallel forces must not be equal in magnitude and direction

Dthe sum of forces in one direction must be equal to the sum of forces in the opposite direction

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Question 37

jamb 2019

The diagram shows four positions of the bob of a simple pendulum. At which of these positions does the bob have maximum kinetic energy and minimum potential energy

CNone Of The Above

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Question 38

jamb 2019

A rectangular solid block has length 10cm, breadth 5cm and height 2cm. If it lies on a horizontal surface, and has density 100kg/m\(^3\), calculate the pressure it exerts on the surface.

A20 N/m\(^2\)

B100 N/m\(^2\)

C400 N/m\(^2\)

D300 N/m\(^2\)

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Question 39

jamb 2019

Which of the following statements are correct of the production and propagation of waves?
I. vibration produces waves
II. waves transmit energy along the medium
III. the medium through which the wave travels does not travel with the wave
IV. waves do not require any medium for transmission

AI & IV only

BII & IV only

CIII & IV only

DI, II and III only

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Question 40

jamb 2019

The angular dispersion of a prism depends on

AThe index of refraction only

BThe angle of incidence as well as the index of refraction

CThe angle of incidence only

DThe thickness of the prism only

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Question 41

jamb 2019

The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.

A3.33%

B5.55%

C33.33%

D55.55%

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Question 42

jamb 2019

A safety precaution designed to prolong the life of a lead acid accumulator is

ABy topping up the cells with concentrated acid

BThe use of naked flame when charging the battery

CKeeping the specific gravity of the electrolyte within specified range

DBy connecting wires to the terminals directly when testing the level of charging

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Question 43

jamb 2019

A copper rod, 5m long, when heated through 10ºC, expands by 1mm. If a second copper rod, 2.5m long, is heated through 5ºC, by how much will it expand?

A4mm

B0.25mm

C2mm

D0.12mm

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Question 44

jamb 2019

Workdone on an object to bring it to a certain point in space is called

AGravitational potential energy

BPotential energy

CKinetic energy

DMechanical energy

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Question 45

jamb 2019

The length of the seconds hand of laboratory clock is 0.1m. Calculate the speed at the top of the seconds hand

A1.05 × 10\(^{-2}\)ms\(^{-1}\)

B1.85 × 10\(^{-4}\)ms\(^{-1}\)

C9.50 × 10\(^{-1}\)ms\(^{-1}\)

D5.25 × 10\(^{-3}\)ms\(^{-1}\)

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Question 46

jamb 2019

A projectile of mass 4kg is fired vertically and reaches a maximum height of 40m. Calculate the potential energy at the highest point
(g = 10ms\(^{-2}\)

A1800J

B1600J

C600J

D440J

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Question 47

jamb 2019

The part of the human eye that does similar work as the diaphragm of a camera lens is the

ACiliary muscles

BPupil

CIris

DRetina

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Question 48

jamb 2019

Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?

AConduction only

BConvection only

CRadiation only

DAll these methods

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Question 49

jamb 2019

If the attraction of the sun is suddenly ceased, the earth would continue to move in a straight line making a tangent with the original orbit. This statement is derived from Newton's

AFirst law of motion

BSecond law of motion

CThird law of motion

DLaw of universal gravitation

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Question 50

jamb 2019

Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?

Adiffraction

Binterference

Crefraction

Dreflection

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